<template>
	<view class="content">
		<!-- 签字弹窗 status -->
		<view class="signMask">
			<view class="sigh-btns">
				<button class="btn" @tap="handleCancel">取消</button>
				<button class="btn" @tap="handleReset">重写</button>
				<button class="btn" @tap="handleConfirm">确认</button>
			</view>
			<view class="sign-box">
				<canvas class="mycanvas" :style="{width:width +'px',height:height +'px'}" canvas-id="mycanvas"
					@touchstart="touchstart" @touchmove="touchmove" @touchend="touchend"></canvas>
				<canvas canvas-id="camCacnvs" :style="{width:height +'px',height:width +'px'}" class="canvsborder"></canvas>
			</view>
		</view>

		<!-- 签字弹窗 end -->

	</view>
</template>
<script>
	import {setSignImg} from '@/api/order'
	let baseUrl = 'https://txxzdata.tingxiangzu.com'
	var x = 20;
	var y = 20;
	var tempPoint = []; //用来存放当前画纸上的轨迹点
	var id = 0;
	var type = '';
	let that;
	let canvasw;
	let canvash;
	export default {
		data() {
			return {
				ctx: '', //绘图图像
				points: [], //路径点集合,
				width: 0,
				height: 0,
				autographStatus: false,
				publish: false,
				PreviewContract: true,
				NavAutograph: true,
				Navpreservation: false,
				orderId:''
			}
		},
		onLoad(option) {
			console.log(option);
			that = this;
			id = option.id;
			type = option.type;
			that.orderId=option.orderId || '55800'
			this.ctx = uni.createCanvasContext('mycanvas', this); //创建绘图对象
			//设置画笔样式
			this.ctx.lineWidth = 4;
			this.ctx.lineCap = 'round';
			this.ctx.lineJoin = 'round';
			uni.getSystemInfo({
				success: function(res) {
					that.width = res.windowWidth * 0.8;
					that.height = res.windowHeight * 0.85;
				}
			});
		},
		onShow() {
			const t = this;
			uni.getStorageSync({
				key: 'autograph_key',
				success: function(res) {
					if (res.data !== '') {
						t.contractImg = res.data
						t.PreviewContract = true;
						t.publish = false;
						t.NavAutograph = false
					}
				}
			});
		},

		methods: {
			agreeSign() {
				this.autographStatus = true;
			},

			//触摸开始，获取到起点
			touchstart: function(e) {
				let startX = e.changedTouches[0].x;
				let startY = e.changedTouches[0].y;
				let startPoint = {
					X: startX,
					Y: startY
				};
				/* **************************************************
				#由于uni对canvas的实现有所不同，这里需要把起点存起来
			 * **************************************************/
				this.points.push(startPoint);

				//每次触摸开始，开启新的路径
				this.ctx.beginPath();
			},
			//触摸移动，获取到路径点
			touchmove: function(e) {
				let moveX = e.changedTouches[0].x;
				let moveY = e.changedTouches[0].y;
				let movePoint = {
					X: moveX,
					Y: moveY
				};
				this.points.push(movePoint); //存点
				let len = this.points.length;
				if (len >= 2) {
					this.draw(); //绘制路径
				}
				tempPoint.push(movePoint);
			},
			touchend: function() {
				this.points = [];
			},
			/* ***********************************************	
					#   绘制笔迹
					#   1.为保证笔迹实时显示，必须在移动的同时绘制笔迹
					#   2.为保证笔迹连续，每次从路径集合中区两个点作为起点（moveTo）和终点(lineTo)
					#   3.将上一次的终点作为下一次绘制的起点（即清除第一个点）
					************************************************ */
			draw: function() {
				let point1 = this.points[0];
				let point2 = this.points[1];
				this.points.shift();
				this.ctx.moveTo(point1.X, point1.Y);
				this.ctx.lineTo(point2.X, point2.Y);
				this.ctx.stroke();
				this.ctx.draw(true);
			},
			handleCancel() {
				uni.navigateBack({
					delta: 1
				});
			},
			//清空画布
			handleReset: function() {
				console.log('handleReset');
				that.ctx.clearRect(0, 0, that.width, that.height);
				that.ctx.draw(true);
				tempPoint = [];
			},
			//将签名笔迹上传到服务器，并将返回来的地址存到本地
			handleConfirm: function() {
				const t = this;
				if (tempPoint.length == 0) {
					uni.showToast({
						title: '请先签名',
						icon: 'none',
						duration: 2000
					});
					return;
				}
				uni.showLoading({
					title: '生成中'
				});
				uni.canvasToTempFilePath({
					canvasId: 'mycanvas',
					success: function(res) {
						let tempPath = res.tempFilePath;
						const ctx = uni.createCanvasContext('camCacnvs', that);
						ctx.translate(0, that.width);
						ctx.rotate((-90 * Math.PI) / 180);
						ctx.drawImage(tempPath, 0, 0, that.width, that.height);
						ctx.draw();
						setTimeout(() => {
							//保存签名图片到本地
							uni.canvasToTempFilePath({
									canvasId: 'camCacnvs',
									success: function(res) {
										//这是签名图片文件的本地临时地址
										let path = res.tempFilePath;
										console.log(path, "保存签名图片到本地")
										// 开始合成
										uni.hideLoading();
										uni.uploadFile({
											url: baseUrl + '/Alipay/upload',
											filePath: res.tempFilePath,
											name: 'file',
											formData: {
												'user': 'test'
											},
											success:res=>{
												const result = JSON.parse(res.data);
												let data={
													orderId:t.orderId,
													signImg:result.data.image
												}
												setSignImg(data).then(res=>{
														uni.showToast({
															icon: 'success',
															title: '上传成功',
															duration: 1000
														})
														uni.navigateTo({
															url:'/pagesB/notarization/notarization?flag=true'+'&orderId='+data.orderId
														})
												})
											}
										})
										
									},
									fail: err => {
										uni.showToast({
											icon: 'fail',
											title: '上传图片失败',
											duration: 1000
										})
									}
								},
								this
							);
						}, 200);
					}
				});
			},
			preservationImg() {
				const t = this;
				uni.downloadFile({
					url: t.contractImg,
					success: res => {
						if (res.statusCode === 200) {
							uni.saveImageToPhotosAlbum({
								filePath: res.tempFilePath,
								success: function() {
									uni.showToast({
										title: '保存成功',
										icon: 'none',
										duration: 2000
									});
								},
								fail: function() {
									uni.showToast({
										title: '保存失败',
										icon: 'none',
										duration: 2000
									});
								}
							});
						} else {
							uni.showToast({
								title: '第三方网络错误',
								icon: 'none',
								duration: 2000
							});
						}
					}
				});
			},
			SigningCompleted() {
				const t = this;
				let ImgType = t.contractImg.split(".")
				uni.getFileSystemManager().readFile({
					filePath: t.contractImg,
					encoding: 'base64',
					success: async (res) => {
						t.contractImg = 'data:image/png;base64,' + res.data;
						uni.showLoading({
							title: '提交中'
						});
						// console.log(res.data)
						const result = await t.$req("/user/upload/img", {
							uid: t.user.uid,
							type: ImgType[1],
							img: res.data,
							place: 'sign'
						})
						let rd = result.data
						// console.log(rd)
						if (rd.code == 0) {
							let data = rd.data
							t.contractImg = data.url;
							uni.hideLoading();
							uni.setStorage({
								key: 'autograph_key',
								data: t.contractImg,
								success: function() {
									console.log("签字", 'success');
								}
							});
							uni.navigateBack({
								delta: 1
							}); // 返回上一页								
						}
					}
				})
			},
			ReSign: function() {
				// console.log(this.ctx)
				this.autographStatus = true
			}
		}
	}
</script>
<style>
	.authentication_top {
		width: 100%;
		height: 90%;
		position: fixed;
		top: 0;
		left: 0;
		right: 0;
		margin: auto;
		overflow-y: scroll;
		padding-bottom: 40rpx
	}

	.authentication_top image {
		width: 100%;
		display: inline-block
	}

	.authentication_bottom {
		width: 100%;
		height: 10%;
		position: fixed;
		bottom: 0;
		left: 0;
		right: 0;
		margin: auto;
		display: flex;
		flex-direction: column;
		justify-content: center;
		align-items: center;
		background: #ffe9e9
	}

	.authentication_bottom button {
		background: 0 0;
		border: none;
		font-size: 15px;
		color: red;
		width: 100%;
		text-align: center
	}

	.authentication_bottom button:after {
		display: none
	}

	.authentication_fun {
		width: 100%;
		height: 10%;
		position: fixed;
		bottom: 30rpx;
		left: 0;
		right: 0;
		margin: auto;
		display: flex;
		flex-direction: row;
		justify-content: center;
		align-items: center;
		background: #ffe9e9;
		padding: 0 3%;
		width: 90%;
		border-radius: 50px;
		box-shadow: 0 3px 13px rgba(0, 0, 0, .2);
		border: 4px solid #fd972e;
		box-sizing: border-box
	}

	.authentication_fun button {
		border: none;
		font-size: 15px;
		background: 0 0;
		width: 100%;
		text-align: center
	}

	.authentication_fun button:after {
		display: none
	}

	.signMask {
		width: 100%;
		height: 100%;
		background: #fff;
		position: fixed;
		top: 0;
		bottom: 0;
		left: 0;
		right: 0;
		flex-direction: row
	}

	.sign-box,
	.signMask {
		margin: auto;
		display: flex
	}

	.sign-box {
		width: 80%;
		height: 90%;
		flex-direction: column;
		text-align: center
	}

	.sigh-btns,
	.sign-view {
		height: 100%
	}

	.sigh-btns {
		margin: auto;
		display: flex;
		flex-direction: column;
		justify-content: space-around
	}

	.btn {
		margin: auto;
		padding: 8rpx 40rpx;
		font-size: 14px;
		transform: rotate(90deg);
		border: 1rpx solid grey
	}

	.mycanvas {
		margin: auto 0rpx;
		background-color: #ececec
	}

	.canvsborder {
		border: 1rpx solid #333;
		position: fixed;
		top: 0;
		left: 10000rpx
	}

	.bgCoverBox {
		width: 100%;
		height: auto;
		border: 1rpx solid red;
	}

	.canvsborder2 {
		height: 700px !important
	}
</style>